As I've said before, I'm not really worried about it. Especially at those high prices (plus the risk of being red-tagged), it's enough of a barrier that it should still serve its intended function of creating a significant cost/barrier for garbage-posters.

BTW, if any merit source goes rogue and sells a ton of merit, then I will probably go through the transaction graph and undo all of the transactions touched by that sold source-merit. Merit ain't no immutable cryptocurrency!